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Updated: Jul 7, 2026
10:52
Protocols for Robust Herbicide Resistance Testing in Different Weed Species
Published on: July 2, 2015
Evolved glyphosate-resistant weeds around the world: lessons to be learnt
1WA Herbicide Resistance Initiative, School of Plant Biology, University of Western Australia, Perth 6014, Australia. spowles@plants.uwa.edu.au
Pest Management Science
|February 15, 2008
Summary
Glyphosate herbicide resistance in weeds is increasing due to widespread use in genetically modified crops. Maintaining diverse weed management strategies is crucial for the sustainable future of glyphosate and global food production.
Area of Science:
- Agricultural Science
- Plant Science
- Environmental Science
Background:
- Glyphosate is a critical herbicide for global agriculture, controlling a broad range of weeds.
- The widespread adoption of glyphosate-resistant crops has led to increased and often exclusive glyphosate use.
- Historically, few weed species evolved resistance, but this is changing rapidly.
Purpose of the Study:
- To highlight the emergence and spread of glyphosate-resistant weeds.
- To identify the risks posed by resistant weeds to glyphosate efficacy and crop production.
- To propose strategies for ensuring the long-term sustainability of glyphosate.
Main Methods:
- Review of scientific literature on glyphosate resistance.
- Analysis of weed resistance evolution in regions with high transgenic crop adoption.
- Case studies from the USA, Argentina, and Brazil detailing resistant weed species.
Main Results:
- Glyphosate-resistant weed populations have evolved in major agricultural regions, including the USA, Argentina, and Brazil.
- Economically damaging species like Ambrosia, Amaranthus, Conyza, Lolium, Sorghum halepense, and Euphorbia heterophylla have developed resistance.
- Continued reliance on glyphosate in resistant crop systems is expected to accelerate the evolution of resistance in other weed species.
Conclusions:
- Evolved glyphosate resistance in weeds poses a significant threat to the continued success of glyphosate and glyphosate-resistant crops.
- Glyphosate resistance is not yet a global issue, offering opportunities to learn and implement preventative measures.
- Maintaining diversity in weed management practices is essential for achieving glyphosate sustainability and ensuring its availability for future food production.
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